/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 04:05:30,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 04:05:30,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 04:05:31,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-24 04:05:31,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-24 04:05:31,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-24 04:05:31,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-24 04:05:31,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-24 04:05:31,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-24 04:05:31,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-24 04:05:31,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-24 04:05:31,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-24 04:05:31,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 04:05:31,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 04:05:31,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 04:05:31,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 04:05:31,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 04:05:31,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 04:05:31,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 04:05:31,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 04:05:31,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 04:05:31,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 04:05:31,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 04:05:31,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 04:05:31,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-24 04:05:31,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-24 04:05:31,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-24 04:05:31,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-24 04:05:31,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-24 04:05:31,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-02-24 04:05:31,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 04:05:31,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 04:05:31,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 04:05:31,046 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 04:05:31,055 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 04:05:31,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 04:05:31,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 04:05:31,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 04:05:31,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 04:05:31,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 04:05:31,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 04:05:31,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 04:05:31,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 04:05:31,057 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 04:05:31,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 04:05:31,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 04:05:31,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 04:05:31,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 04:05:31,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 04:05:31,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:05:31,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 04:05:31,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 04:05:31,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 04:05:31,058 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 04:05:31,058 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 04:05:31,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 04:05:31,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 04:05:31,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 04:05:31,249 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 04:05:31,249 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 04:05:31,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c [2022-02-24 04:05:31,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b40866c/def38a3f5be54aeb92939c106838ef95/FLAG7dd3d6d4e [2022-02-24 04:05:31,676 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 04:05:31,677 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c [2022-02-24 04:05:31,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b40866c/def38a3f5be54aeb92939c106838ef95/FLAG7dd3d6d4e [2022-02-24 04:05:31,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b40866c/def38a3f5be54aeb92939c106838ef95 [2022-02-24 04:05:31,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 04:05:31,702 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 04:05:31,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 04:05:31,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 04:05:31,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 04:05:31,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:05:31" (1/1) ... [2022-02-24 04:05:31,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63debbf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:31, skipping insertion in model container [2022-02-24 04:05:31,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:05:31" (1/1) ... [2022-02-24 04:05:31,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 04:05:31,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 04:05:31,882 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c[586,599] [2022-02-24 04:05:31,931 WARN L1545 CHandler]: Possible shadowing of function min [2022-02-24 04:05:31,956 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:05:31,966 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 04:05:31,978 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c[586,599] [2022-02-24 04:05:31,994 WARN L1545 CHandler]: Possible shadowing of function min [2022-02-24 04:05:32,008 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:05:32,020 INFO L208 MainTranslator]: Completed translation [2022-02-24 04:05:32,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:32 WrapperNode [2022-02-24 04:05:32,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 04:05:32,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 04:05:32,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 04:05:32,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 04:05:32,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:32" (1/1) ... [2022-02-24 04:05:32,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:32" (1/1) ... [2022-02-24 04:05:32,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:32" (1/1) ... [2022-02-24 04:05:32,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:32" (1/1) ... [2022-02-24 04:05:32,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:32" (1/1) ... [2022-02-24 04:05:32,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:32" (1/1) ... [2022-02-24 04:05:32,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:32" (1/1) ... [2022-02-24 04:05:32,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 04:05:32,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 04:05:32,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 04:05:32,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 04:05:32,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:32" (1/1) ... [2022-02-24 04:05:32,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:05:32,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 04:05:32,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 04:05:32,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 04:05:32,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 04:05:32,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 04:05:32,171 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2022-02-24 04:05:32,171 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 04:05:32,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 04:05:32,172 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-02-24 04:05:32,172 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2022-02-24 04:05:32,172 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2022-02-24 04:05:32,173 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2022-02-24 04:05:32,173 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2022-02-24 04:05:32,173 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2022-02-24 04:05:32,173 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 04:05:32,173 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-02-24 04:05:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-02-24 04:05:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-02-24 04:05:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-02-24 04:05:32,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 04:05:32,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-02-24 04:05:32,176 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2022-02-24 04:05:32,176 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 04:05:32,176 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 04:05:32,177 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 04:05:32,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 04:05:32,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 04:05:32,177 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-02-24 04:05:32,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-02-24 04:05:32,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 04:05:32,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-02-24 04:05:32,177 INFO L130 BoogieDeclarations]: Found specification of procedure min [2022-02-24 04:05:32,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 04:05:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-02-24 04:05:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2022-02-24 04:05:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 04:05:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2022-02-24 04:05:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure size [2022-02-24 04:05:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure task [2022-02-24 04:05:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 04:05:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-02-24 04:05:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 04:05:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 04:05:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 04:05:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 04:05:32,301 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 04:05:32,303 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 04:05:32,603 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 04:05:32,609 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 04:05:32,609 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-24 04:05:32,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:05:32 BoogieIcfgContainer [2022-02-24 04:05:32,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 04:05:32,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 04:05:32,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 04:05:32,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 04:05:32,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:05:31" (1/3) ... [2022-02-24 04:05:32,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb6d6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:05:32, skipping insertion in model container [2022-02-24 04:05:32,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:05:32" (2/3) ... [2022-02-24 04:05:32,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb6d6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:05:32, skipping insertion in model container [2022-02-24 04:05:32,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:05:32" (3/3) ... [2022-02-24 04:05:32,640 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2022-02-24 04:05:32,643 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 04:05:32,643 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 04:05:32,682 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 04:05:32,688 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-24 04:05:32,688 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 04:05:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 61 states have internal predecessors, (76), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-24 04:05:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 04:05:32,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:32,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:32,711 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:32,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:32,715 INFO L85 PathProgramCache]: Analyzing trace with hash -738616471, now seen corresponding path program 1 times [2022-02-24 04:05:32,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:32,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248611013] [2022-02-24 04:05:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:32,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:32,768 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:32,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:32,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:05:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:32,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:32,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 04:05:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:33,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-24 04:05:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:33,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:05:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:33,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:05:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:33,094 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:33,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248611013] [2022-02-24 04:05:33,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1248611013] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:33,095 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:33,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:05:33,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070173225] [2022-02-24 04:05:33,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:33,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:05:33,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:33,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:05:33,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:05:33,126 INFO L87 Difference]: Start difference. First operand has 98 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 61 states have internal predecessors, (76), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-24 04:05:33,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:33,677 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2022-02-24 04:05:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:05:33,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-02-24 04:05:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:33,685 INFO L225 Difference]: With dead ends: 174 [2022-02-24 04:05:33,685 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 04:05:33,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-02-24 04:05:33,690 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 150 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:33,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 97 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:05:33,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 04:05:33,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2022-02-24 04:05:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 56 states have internal predecessors, (64), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2022-02-24 04:05:33,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2022-02-24 04:05:33,725 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 44 [2022-02-24 04:05:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:33,726 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2022-02-24 04:05:33,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-24 04:05:33,726 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2022-02-24 04:05:33,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 04:05:33,728 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:33,728 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:33,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 04:05:33,728 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:33,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1232690542, now seen corresponding path program 1 times [2022-02-24 04:05:33,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:33,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839235861] [2022-02-24 04:05:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:33,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:33,731 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:33,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:33,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:05:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:33,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:05:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:33,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 04:05:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:33,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:05:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:33,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:05:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:33,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 04:05:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:33,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 04:05:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:33,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-24 04:05:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-24 04:05:33,979 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:33,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839235861] [2022-02-24 04:05:33,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [839235861] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:33,979 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:33,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:05:33,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2373844] [2022-02-24 04:05:33,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:33,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:05:33,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:33,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:05:33,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:05:33,981 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 7 states have internal predecessors, (32), 6 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-02-24 04:05:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:34,629 INFO L93 Difference]: Finished difference Result 165 states and 211 transitions. [2022-02-24 04:05:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:05:34,629 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 7 states have internal predecessors, (32), 6 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2022-02-24 04:05:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:34,631 INFO L225 Difference]: With dead ends: 165 [2022-02-24 04:05:34,632 INFO L226 Difference]: Without dead ends: 97 [2022-02-24 04:05:34,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-02-24 04:05:34,633 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 183 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:34,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 84 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:05:34,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-24 04:05:34,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2022-02-24 04:05:34,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 58 states have internal predecessors, (65), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2022-02-24 04:05:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2022-02-24 04:05:34,647 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 56 [2022-02-24 04:05:34,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:34,648 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2022-02-24 04:05:34,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 7 states have internal predecessors, (32), 6 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-02-24 04:05:34,648 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2022-02-24 04:05:34,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 04:05:34,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:34,649 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:34,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 04:05:34,650 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:34,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:34,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1976466705, now seen corresponding path program 1 times [2022-02-24 04:05:34,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:34,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422078608] [2022-02-24 04:05:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:34,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:34,652 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:05:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:05:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 04:05:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-24 04:05:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:05:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:05:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 04:05:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 04:05:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-24 04:05:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-02-24 04:05:34,830 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:34,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422078608] [2022-02-24 04:05:34,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [422078608] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:34,831 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:34,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:05:34,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152366208] [2022-02-24 04:05:34,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:34,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:05:34,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:34,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:05:34,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:05:34,832 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-02-24 04:05:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:35,434 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2022-02-24 04:05:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:05:35,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2022-02-24 04:05:35,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:35,436 INFO L225 Difference]: With dead ends: 164 [2022-02-24 04:05:35,436 INFO L226 Difference]: Without dead ends: 99 [2022-02-24 04:05:35,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-02-24 04:05:35,437 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 141 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:35,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 84 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:05:35,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-02-24 04:05:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-02-24 04:05:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 60 states have internal predecessors, (66), 25 states have call successors, (25), 11 states have call predecessors, (25), 12 states have return successors, (30), 23 states have call predecessors, (30), 23 states have call successors, (30) [2022-02-24 04:05:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2022-02-24 04:05:35,452 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 66 [2022-02-24 04:05:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:35,452 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2022-02-24 04:05:35,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-02-24 04:05:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2022-02-24 04:05:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 04:05:35,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:35,459 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:35,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 04:05:35,459 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:35,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:35,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1818938389, now seen corresponding path program 1 times [2022-02-24 04:05:35,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:35,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162584154] [2022-02-24 04:05:35,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:35,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:35,461 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:05:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:05:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:05:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 04:05:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:05:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:05:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-24 04:05:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:05:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:05:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-24 04:05:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-24 04:05:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 04:05:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-02-24 04:05:35,650 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:35,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162584154] [2022-02-24 04:05:35,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1162584154] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:35,650 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:35,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:05:35,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106373862] [2022-02-24 04:05:35,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:35,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:05:35,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:35,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:05:35,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:05:35,652 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (16), 7 states have call predecessors, (16), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-24 04:05:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:36,337 INFO L93 Difference]: Finished difference Result 152 states and 194 transitions. [2022-02-24 04:05:36,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 04:05:36,337 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (16), 7 states have call predecessors, (16), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2022-02-24 04:05:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:36,338 INFO L225 Difference]: With dead ends: 152 [2022-02-24 04:05:36,338 INFO L226 Difference]: Without dead ends: 99 [2022-02-24 04:05:36,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2022-02-24 04:05:36,340 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 192 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:36,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 90 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:05:36,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-02-24 04:05:36,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2022-02-24 04:05:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 62 states have internal predecessors, (67), 25 states have call successors, (25), 11 states have call predecessors, (25), 13 states have return successors, (33), 23 states have call predecessors, (33), 23 states have call successors, (33) [2022-02-24 04:05:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2022-02-24 04:05:36,363 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 79 [2022-02-24 04:05:36,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:36,364 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2022-02-24 04:05:36,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (16), 7 states have call predecessors, (16), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-24 04:05:36,364 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2022-02-24 04:05:36,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-24 04:05:36,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:36,366 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:36,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 04:05:36,366 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:36,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:36,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1854783018, now seen corresponding path program 1 times [2022-02-24 04:05:36,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:36,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090550998] [2022-02-24 04:05:36,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:36,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:36,368 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:05:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 04:05:36,407 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-24 04:05:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 04:05:36,456 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-24 04:05:36,456 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-24 04:05:36,458 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 04:05:36,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 04:05:36,461 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-02-24 04:05:36,463 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 04:05:36,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:05:36 BoogieIcfgContainer [2022-02-24 04:05:36,474 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 04:05:36,475 INFO L158 Benchmark]: Toolchain (without parser) took 4772.57ms. Allocated memory was 166.7MB in the beginning and 210.8MB in the end (delta: 44.0MB). Free memory was 110.8MB in the beginning and 153.4MB in the end (delta: -42.6MB). Peak memory consumption was 1.7MB. Max. memory is 8.0GB. [2022-02-24 04:05:36,475 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 166.7MB. Free memory is still 127.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 04:05:36,475 INFO L158 Benchmark]: CACSL2BoogieTranslator took 314.37ms. Allocated memory was 166.7MB in the beginning and 210.8MB in the end (delta: 44.0MB). Free memory was 110.5MB in the beginning and 181.5MB in the end (delta: -71.0MB). Peak memory consumption was 11.8MB. Max. memory is 8.0GB. [2022-02-24 04:05:36,475 INFO L158 Benchmark]: Boogie Preprocessor took 56.35ms. Allocated memory is still 210.8MB. Free memory was 181.5MB in the beginning and 179.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-24 04:05:36,476 INFO L158 Benchmark]: RCFGBuilder took 533.10ms. Allocated memory is still 210.8MB. Free memory was 179.4MB in the beginning and 158.5MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2022-02-24 04:05:36,476 INFO L158 Benchmark]: TraceAbstraction took 3850.85ms. Allocated memory is still 210.8MB. Free memory was 157.9MB in the beginning and 153.4MB in the end (delta: 4.5MB). Peak memory consumption was 5.1MB. Max. memory is 8.0GB. [2022-02-24 04:05:36,477 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 166.7MB. Free memory is still 127.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 314.37ms. Allocated memory was 166.7MB in the beginning and 210.8MB in the end (delta: 44.0MB). Free memory was 110.5MB in the beginning and 181.5MB in the end (delta: -71.0MB). Peak memory consumption was 11.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 56.35ms. Allocated memory is still 210.8MB. Free memory was 181.5MB in the beginning and 179.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 533.10ms. Allocated memory is still 210.8MB. Free memory was 179.4MB in the beginning and 158.5MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * TraceAbstraction took 3850.85ms. Allocated memory is still 210.8MB. Free memory was 157.9MB in the beginning and 153.4MB in the end (delta: 4.5MB). Peak memory consumption was 5.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L110] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L31] RET, EXPR nondet_tree() [L31] n->right = nondet_tree() [L32] return n; [L110] RET, EXPR nondet_tree() [L110] CALL task(nondet_tree()) [L86] CALL, EXPR min(t) [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left [L41] CALL, EXPR min(n->left) [L37] COND TRUE !n [L38] return 2147483647; [L41] RET, EXPR min(n->left) [L41] int b = min(n->left); [L42] EXPR n->right [L42] CALL, EXPR min(n->right) [L37] COND TRUE !n [L38] return 2147483647; [L42] RET, EXPR min(n->right) [L42] int c = min(n->right); [L43] COND TRUE b <= a && b <= c [L43] return b; [L86] RET, EXPR min(t) [L86] int a = min(t); [L87] int b; [L89] CALL, EXPR size(t) [L81] COND FALSE !(!t) [L82] EXPR t->left [L82] CALL, EXPR size(t->left) [L81] COND TRUE !t [L81] return 0; [L82] RET, EXPR size(t->left) [L82] EXPR t->right [L82] CALL, EXPR size(t->right) [L81] COND TRUE !t [L81] return 0; [L82] RET, EXPR size(t->right) [L82] return size(t->left) + size(t->right) + 1; [L89] RET, EXPR size(t) [L89] int n = size(t); [L90] CALL assume_cycle_if_not(n != 0) [L9] COND FALSE !(!cond) [L90] RET assume_cycle_if_not(n != 0) [L91] EXPR, FCALL calloc(n, sizeof(int)) [L91] int *x = calloc(n, sizeof(int)); [L92] CALL tree_inorder(t, x, n) [L70] COND FALSE !(!t) [L73] EXPR t->left [L73] CALL, EXPR tree_inorder(t->left, a, i) [L70] COND TRUE !t [L71] return i; [L73] RET, EXPR tree_inorder(t->left, a, i) [L73] i = tree_inorder(t->left, a, i) [L74] EXPR i++ [L74] EXPR t->data [L74] a[i++] = t->data [L75] EXPR t->right [L75] CALL, EXPR tree_inorder(t->right, a, i) [L70] COND TRUE !t [L71] return i; [L75] RET, EXPR tree_inorder(t->right, a, i) [L75] i = tree_inorder(t->right, a, i) [L76] return i; [L92] RET tree_inorder(t, x, n) [L93] EXPR x[0] [L93] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 101 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.8s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 704 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 666 mSDsluCounter, 355 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 64 mSDsCounter, 614 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3484 IncrementalHoareTripleChecker+Invalid, 4098 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 614 mSolverCounterUnsat, 291 mSDtfsCounter, 3484 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=0, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 17 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-02-24 04:05:36,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...